Short discourse...
It depends on how you play of course. A vampire might still be attracted to the other or same gender and probably has still the kinks she had in her life. You can even spend blood to use your sexual organs again, but you probably won't get to climax and their are no body fluids save then blood.
The Toreador or Brujah with their connections to the mortal world will be more inclined toward a sexual relationship ( even if it's only for feeding or domination purposes, i.e. the Toreador who has a relationship with a living artist ) then a Gangrel or Tremere. Priorities change with time, so older vampires are not that much interested in it anymore, while younger ones might still feel the need for sex. Likewise, vampires with a low humanity ( 5 or 4 and lower ) won't be able to have sex, while ones with high humanity values ( 6 and higher ) might still be interested.